The amount of potassium permanganate required for disinfection purpose – McqOptions

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1.	The amount of potassium permanganate required for disinfection purpose is:
A.	1 - 2 mg/l
B.	5 - 7 mg/l
C.	0.1 - 05 mg/l
D.	10 - 12 mg/l
E.	20 -- 25mg/l
Answer» B. 5 - 7 mg/l

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